Genetics
Congenital bilateral absence of the vas deferens causes obstructive azoospermia and is strongly associated with cystic fibrosis gene changes. Sperm production is usually normal, so retrieval with ICSI works well, but CF carrier testing of both partners and genetic counselling should come first.
Also known as: congenital bilateral absence of the vas deferens
Sources
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists (ranzcog.edu.au)
- Royal College of Pathologists of Australasia (rcpa.edu.au)
Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.